Bulk SMS API for reliable global delivery

Integrate scalable bulk SMS sending for campaigns, critical alerts, and announcements. Reach thousands or millions of users worldwide.

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18,081 companies worldwide trust BulkGate for high-volume messaging

Why choose BulkGate as your bulk SMS API provider

SMS API scaling infrastructure handling millions of messages daily

Built for massive scale

Our high-throughput infrastructure processes millions of messages daily and scales smoothly through traffic spikes.

High-speed reliable SMS API for fast bulk message delivery

High-speed and reliable delivery

Direct carrier connections and high-performance routing deliver bulk messages fast, without queues or long waits.

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Developer-friendly API for easy bulk SMS messaging integration

Developer-friendly integration

Integrate our bulk SMS API in minutes with a clean REST API, comprehensive documentation, and a ready-made PHP SDK.

Global SMS delivery – bulk campaigns to 200+ countries via single API

Global reach, one API

Send bulk SMS to 200+ countries through one API. We handle global carrier networks so you can focus on your message.

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What you can build with our bulk messaging API

Our flexible bulk SMS API is designed to meet even the most demanding one-to-many communication requirements.

Promotional campaigns

Critical alerts

Mass announcements

POST /api/2.0/advanced/promotional HTTP/1.1 Host: portal.bulkgate.com Content-Type: application/json Cache-Control: no-cache { "application_id": 451, "application_token": "YDbkJ5tXeZkqF48dCQEHiVMiK1m95atbhbn83CYHi0BareuraP", "number": [ {"number": "420777777777", "variables": {"first_name": "Johny", "last_name": "SilverHand", "company": "Arasaka"}}, {"number": "420888888888", "variables": {"first_name": "Kerry", "last_name": "Eurodyne", "company": "Biotechnica"}}, {"number": "420999999999", "variables": {"first_name": "David", "last_name": "Martinez", "company": "Militech"}} ], "country": "cz", "channel": { "sms": { "sender_id": "gText", "sender_id_value": "Delamain", "unicode": true, "text": "Greetings <first_name> <last_name>, don't miss out on our special deal with 50% on premium military grade cyberware from <company>. Call now." } } }

Deliver time-sensitive critical alerts

Send outage, security, and emergency alerts as quickly as possible with our high-performance engine.

POST /api/2.0/advanced/transactional HTTP/1.1 Host: portal.bulkgate.com Content-Type: application/json Cache-Control: no-cache { "application_id": 451, "application_token": "YDbkJ5tXeZkqF48dCQEHiVMiK1m95atbhbn83CYHi0BareuraP", "number": [ "420777777777", "420888888888", "420999999999" ], "country": "cz", "channel": { "sms": { "sender_id": "gText", "sender_id_value": "Delamain", "unicode": true, "text": "CRITICAL: System error detected, out team is investigating." } } }

Launch high-impact marketing campaigns

Send personalized promotions and product updates to thousands. Dynamic variables boost engagement and conversions.

POST /api/2.0/advanced/transactional HTTP/1.1 Host: portal.bulkgate.com Content-Type: application/json Cache-Control: no-cache { "application_id": 451, "application_token": "YDbkJ5tXeZkqF48dCQEHiVMiK1m95atbhbn83CYHi0BareuraP", "number": [ "420777777777", "420888888888", "420999999999" ], "country": "cz", "schedule": "2026-06-11T22:00:00Z", "channel": { "sms": { "sender_id": "gText", "sender_id_value": "Delamain", "unicode": true, "text": "Planned maintanance today at: 22:00-23:00. Thank you for your patience." } } }

Automate large-scale announcements

Inform all users about events, service changes, or new policies. Schedule sending and track delivery in real time.

Powerful bulk SMS API features built for scale

Intelligent audience segmentation Create dynamic rule-based segments or manage static lists for precise targeting.

Dynamic message personalization Personalize messages with names, order details, and custom data. Automatic inflection keeps messages natural in supported languages.

Campaign automation and scheduling Trigger campaigns based on events or schedule them for a specific time—from instant responses to recurring promotions.

Flexible sender ID options Use your own alphanumeric sender ID or number. Where unsupported, the system automatically selects a default sender.

Automated list maintenance The API automatically manages opt-outs and removes duplicates, keeping lists clean and costs under control.

URL shortener and campaign analytics Shorten links and track clicks, deliveries, and conversions in real time for accurate ROI calculation.

SMS A/B testing interface comparing message variants for campaigns

A/B testing and optimization Test message variants and send times. Analytics reveals the best-performing approach for future campaigns.

Multichannel cascade with SMS fallback Start with Viber or RCS and automatically switch to SMS if delivery fails. Increase reach and optimize costs. Business Messaging API

Robust API protection and full budget control

Protect your bulk SMS API from misuse and unexpected expenses. Our platform gives you the tools to secure your integrations and manage spending with confidence.

Bulk SMS API budget management interface for sending limits control

Granular access management Create dedicated API keys for each project or campaign, with separate permissions and spending limits.

Bulk SMS API token management dashboard for key and access control

Always within budget Set daily, monthly, or per-country spending limits and get alerts before you exceed your budget.

Bulk SMS anti-fraud protection graph monitoring sending patterns

Automatic abuse protection Prevent costly mistakes with rate limiting, cross-campaign duplicate protection, and real-time activity monitoring.

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Flexible bulk SMS API integration options

Integrate our bulk messaging API effortlessly into your applications and workflows.

Clean REST API

Use stable REST API endpoints for reliable performance even under heavy campaign loads.

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Helpful SDKs

Speed up development with our PHP SDK. Simplifies mass sending, campaign scheduling, and tracking.

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Advanced connection (SMPP)

For businesses with high message volumes, we offer robust and persistent connections via the SMPP protocol.

Building for clients or integrating with BulkGate? Partner with us!

Leverage our bulk SMS API for your projects and unlock new revenue streams or enhance your own product. We offer specialized programs to support your goals.

For agencies and consultants

Offer BulkGate SMS to clients and earn recurring commissions through our Affiliate Program. We provide the tools.

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For developers and SaaS providers

Build with our bulk messaging API and gain joint marketing and revenue sharing through our Integration Partner program.

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Start sending mass messages via API in minutes

Getting started with our bulk SMS API is simple.

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Generate your unique API key in the portal

Send your first bulk campaign using our quick start guide

Frequently asked questions

How fast can I send a bulk SMS campaign via the API?

Our high-speed SMS gateway is built for maximum throughput, processing thousands of messages per minute. For a typical campaign of 10,000 messages, delivery usually begins within seconds of the API call and completes within minutes, depending on target network load. For extremely high-volume needs, we offer dedicated SMPP connections.

How do I handle delivery reports for thousands of messages?

The most efficient method is using webhooks. Set up an endpoint URL in your BulkGate account and our platform will automatically push real-time status updates (e.g., delivered, failed, rejected) for every individual message directly to your server. This enables detailed analytics at scale without repeatedly polling our API.

How can I track link clicks in my campaign?

Our API has a built-in URL shortener. When activated, it automatically converts any URL in your message into a unique, trackable short link for each recipient. You can then receive click data in real time via webhooks — seeing not just how many people clicked, but exactly who clicked. This lets you segment your most engaged audience.

Can I use a custom branded domain for short links?

Yes. While you can use our default short domain, we strongly recommend using your own. You can purchase any short domain and we'll help you configure it to work exclusively with your BulkGate account. This significantly increases brand trust and click-through rates.

Can I schedule a large campaign for a specific time via the API?

Yes. The API includes a schedule parameter where you specify a future date and time in ISO 8601 format (UTC). Our system reliably holds the campaign and begins sending at the exact specified moment.

How does personalization work in a single API call for mass messages?

You provide one message template with variables (placeholders, e.g., {name}, {link}) and an array of recipients. Each recipient object can contain its own variables field with user-specific data. Our system merges the data for each recipient before sending — all within a single efficient API call.

Can I manage contact lists and segments via the API?

Yes. Our API provides a complete set of endpoints for programmatic contact, list, and segment management. You can add, update, or remove contacts and sync your CRM or database with BulkGate to ensure your audience data is always current.

What happens if I try to send a message to a number that opted out?

Our system automatically manages opt-outs. If a user replied 'STOP' or was unsubscribed by other means, any subsequent attempt to send a SMS marketing message to that number will be blocked. This protects your brand and helps you stay compliant with regulations like GDPR.

Can I run A/B tests on campaigns via the API?

Yes, you can create A/B variants in your campaign to test different message versions and send times. Analytics help you identify the best-performing approaches for future optimization.

How are sending limits and budget control managed via the API?

You have granular control. In your account, you can set daily sending limits — both globally and per country. If a campaign exceeds these limits, it will be paused. You can also create separate API keys with their own individual budgets for different projects or clients.

Does the bulk SMS API support Unicode (accented characters and emoji)?

Yes, our bulk SMS API fully supports Unicode (UTF-8 and UTF-16) for sending messages in any language. You can use accented characters and emoji without issues. Keep in mind that Unicode messages have a shorter character limit (70 characters vs. 160 for standard SMS), which may affect campaign cost depending on message length.

Ready to send mass messages at scale?

Message queues, scaling limits, unreliable delivery? That's over. Join 18,081 businesses that send bulk SMS through BulkGate.

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